[Dynamic Zones] Implement dz switch id (#2343)

This adds the `dz_switch_id` field to doors and dynamic_zones. It will
allow for compasses to be automatically added to dz entrances and will
support moving clients to the dz on use without needing to script it.
These can be imported for switches/doors from live packet dumps.

Also removes compass packet encoders (same struct in all clients)

common/patches/uf_structs.h

@@ -4357,7 +4357,7 @@ struct DynamicZoneCompassEntry_Struct
 /*000*/ uint16 dz_zone_id;      // target dz id pair
 /*002*/ uint16 dz_instance_id;
 /*004*/ uint32 dz_type;         // 1: Expedition, 2: Tutorial (purple), 3: Task, 4: Mission, 5: Quest (green)
-/*008*/ uint32 unknown008;
+/*008*/ uint32 dz_switch_id;
 /*012*/ float y;
 /*016*/ float x;
 /*020*/ float z;